Electric heating element



S. S. BOLSINGER ELECTRIC HEA'IIING ELEMENT Aug. 7, 1928;

Filed Oct. 8, 1927 2 Sheets-Sheet l Fig 5.

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Aug. 7, 1928.

' S. 5. BOLSINGER ELECTRIC HEATING ELEIIEN'I' 2 Sheets-Sheet 2 Filed Oct. 8, 1927 1A- Q 21 -Q 1 (921 IN V EN TOR. S. Bolsin ge r,

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Patented Aug. 7, 1928.

T itaaasi UNITED STATES. raranrort ce.

SAMUEL s. BOLSINGER, or Eo'sEBUne, onneon.

nnnornro HEATING ELEMENT.

I Application filed October 8, 1927; Serial No. 224,911;

This invention relatesto an electric heater,

. and has for its object to provide, in-a manner as hereinafter set forth, a device of such ,class for-use in connection withhydrocarhon generators or Vaporizers to overcome the fire hazard, delay any objectionable features present due to priming, by gasoline or alco hol, to cause the lighting of the burner element of the generator.

Further objects of the invention are to provide, in a manner as hereinafter set forth, an electric heater which is simple in its construction and arrangement, strong, durable,

compact, readily installed with respect to the fuel feed line leading to the burner of a hydrocarbon generator, thoroughly efficient in its use to enable the quick vaporizing of the hydrocarbon whereby the burner of the generator can be ignited without delay, and inexpensive to manufacture.

With the foregoing and other objects'in view the invention consists of the novel con structlon, combination and arrangement of parts as hereinafter more specifically de-- 5 scribed, and illustrated in the accompanymg drawings, wherein is shown an embodiment of the invention, but it to be under- Figure 2 is a section on line 22 Figure 1. 1

Figure 3 is a section on line 33 Figure 1.

Figure 4 is a top plan view of the heater showing the adaptation thereof with respect to a hydrocarbon or fuel feed line.

Figure 5 is a section on line 5-5 Figure 2.

Figure 6 is an elevation of one of the end supporting plates.

Figure 7 is a longitudinal sectional view of one of the cores of the heating element.

7 Figure 8 is an end view of a core.

Figure 9 is a disassembled view illustrating the means for anchoring a core of a heating elementin position with respect to the end plates.

Referring to Figures 1 to 9 of the drawings, an electric heater, in accordance with this invention, includes a plurality of heating elements, preferably four in number and which are indicated generally at 1, '2, 3 and 4. Each of said elements con'iprises a tubular core 5 of porcelainandwhich has its periphery'formed throughout with squared threads 6. The threads of the core of the element 1 are right, the threads of the core of'the element 2 are left, the threads ofthe core of the element 3 are left and the threads of the core of the element 4 are right. Preferably the threads are one-sixteenth ofan inch deep. Wound upon each core throughout the threads thereof is an electrical c0nductor of flat nichrome wire, indicated at 7. Asingle length of wire is employedand one end thereof depends from the element 3, as at 8 and the other end depends from the element '4 as at 9. The flat threads'are pro' vided so that the coils of the wire will not crowd together when the wire is expanded by heat. The wire is first wound on the core of theelement 3' then extended upwardly and wound upon the core of the element 1 i v and extended from the latter to the element 2 and wound on the core thereof and extends from the core of the element 2 andis wound on the core of the element 4. Theen ds of the wire 7 are provided with sockets 11 for coupling the wire, which is termed a heating member, to a source of electrical energy. Positioned against each end of a core is an insulator 12 and preferably it is in the form of a mica washer.

The elements 1 to 4 are arranged between a pair of end or supporting plates 18, 14

and which have openings15, at the centers thereof for the purpose of mounting the heater upon the hydrocarbon feed line 16 to the burner whereby the heating'elements 1 to 4 will surround and heat-said line, when the heating member is active, thereby; vaporizing the hydrocarbon so that the burner can be lighted without any delay or objection. I r j The heating elements 1 to 4 are secured to andbetween the plates 13, 14 by holdfast devices, one for each heaterelement, and

each .holdfast device consists of a bolt 17,

provided at one end with a reduced periph erally threaded portion18 and at its'other; end with a head 19. The plate 13 isformed with openings for the passage of the shankof the bolt 17 and the reduced end 19 extends through a washer 18 and has threaded engagement with the threaded Wall of an opening 20' formed in the plate 14. The

heads 19 of the bolts abut against the outer face of the plate 13. The manner of connecting the heating elements to the end plates, permits of conveniently dismantling the heater when desired and also permits of the same to be expeditiously attached in position with respect to the fuel supply or feed linelG. The openings for the passage of the shanks of the bolts 17, which are formed in the plate 13, are indicated at 21. The bolts 17 extend through the cores 5,'as these latter are tubular. Each heater element not only includes a core 5, but a portion of the length of the wire 7.

The heater, when properly installed, will greatly reduce the timein generating, and will also eliminate all possibility of acci dent from fire while generating. The heaters consume but little power, as they can be turnedoff imn'iediately after the burner is lit, as the burners then act to automatically heat the generator.

It is thought the many advantages of an electric heater, in accordance with this invention, and for the purpose set forth, can be readily understood, and although the preferred embodiment of the invention is as illustrated and described, yet it is to be understood thatchangcs in the details of construction can be had which fall within the scope of the invention as claimed. I

lVhat I claim is:

1. An electricvheater comprising a plural ity of heating elements consisting of tubu lar cores of non-conducting material and a single conductor common to the cores and adaptedto have its ends connected with an electrical source, said conductor having a length thereof spirally wound on each'of said cores, said cores being formed in their outer faces with squared, spiral threads to receive said conductor therein to permit expansi on of said conductor and to prevent the convolutions thereof from crowding together, and supporting means connected to and maintaining said elements in spaced relation, said supporting means provided with openings for the mounting thereof on a fuel feed 'lineto position surround. the latter. 1

2. An electric heater con'iprising a plural ityof heat ng elements consisting of tuhular cores of non-conducting material. and a single conductor wound on and common to the coresand adapted to have its ends conncctedavith an electrical source, said cores being formed with spiral threads to provide a seat for said conductor and to prevent the convolutions thereof from crowding together upon the expansion of the conductor, supporting means connected to and mainsaid elements to tioned hereto.

taining said elements in spaced relation, said sljipporting'means provided with openings for the mounting thereof on a fuel feed line to position said elements to surround the latter, and insulators interposed between the ends of the cores and said supporting means.

3. An electric heater comprising a plurality of heating elements consisting of tubular cores of non-conducting material and a single conductor common to the cores and adapted to have its ends connected with an electrical source, said conductor having a lengh. thereof spirally wound'on each of said cores, said cores being formed in their outer faces with squared, spiral threads of greater depth than the diameter of said conductor to receive the conductor therein to permit expansion of the conductor and to prevent the convolutions thereof from crowding together, and supporting means connected to and maintaining said elements in spaced relation, said supporting means provided with openings for the mounting thereof on a fuel feed line-t0 position said elements to surround the latter, certain of said cores having right threads and the others left threads.

4. An electric heater comprising .a plurality of heating elements consisting of peripherally threaded, tubular cores of nonconducting material and a single conductor mounted in the threads of and common to the cores and adapted tohave its ends connected with an electrical source said peripheral threads providing expansion. grooves for said conductor and also providing spacing means for the convolutions thereof, plates positioned at the ends of the cores and having openings for mounting the plates on a fuel feed line, and means for securing'the cores to the plates in circumferential relation to said line.

5. An electrical heater comprising a plurality ofheating elements consisting of poripherally threaded, tubular cores of nonconducting material and a single conductor mounted in the threads of and common to the cores and adapted to have its ends connected with an electrical. source, plates positioned at the, ends ofthe cores and having openings for mounting the plates on a'fuel feed line, insulating washers interposed between the cores and plates, said plates being further infovided with openings disposed in circumferential. relation to the first menopenings, and bolts extending through the last mentioned openings and through said washers and through the cores In testimony whereof, I aiiix mysignature SAMUEL s. BOLSINGER. 

